Umbrella



FIG. 1 is a front view showing the umbrella;

FIG. 2 is a back view of the umbrella;

FIG. 3 is a right side view of the umbrella;

FIG. 4 is a left side view of the umbrella;

FIG. 5 is a top view of the umbrella;

FIG. 6 is a bottom view of the umbrella; and,

FIG. 7 is a perspective view of the umbrella.

The broken lines on the drawings are shown for the purpose of illustrating unclaimed portions of the umbrella and form no part of the claimed design. 

CLAIM The ornamental design for an umbrella, as shown and described. 